You must have the Oracle Rdb CONTROL privilege to use the DELETE
    PROTECTION statement.

    Revoking a privilege takes effect after the users detaches and
    attaches to the database again.

    You must execute this statement in a read/write transaction.
    If there is no active transaction and you issue this statement,
    Oracle Rdb starts a read/write transaction implicitly.

    Other users are allowed to be attached to the database when you
    issue the DELETE PROTECTION statement.